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Kactus - Could you post a few photos or pm me them of the seat stays and the seat tube stickers if it's not too much trouble. I'm trying to date/get more info about another Sekai "professional" (
http://www.bikeforums.net/classic-vi...i-line-up.html) and yours is the only one I can compare it to. Hard to find good photos of Sekai 4000/5000 online. Thanks!